Governor.



No. 890,748. I PATENTED JUNE 16,1908

A. 0. ALLAN.

GOVERNOR.

APPLIGATION FILED OCT. 14, 1907 ALLAN CHURCH ALLAN or CHICAGO, ILLINOIS.

GOVERNOR.

Specification of Letters Patent.

Patented June .16, 1908.

Application filed October 14, 1907. Serial No. 397:317.

To' all whom it may concern:

Be it known that I, ALLAN CHURCH ALLAN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Engine-Governors,ofwhich the following is a specification.

My invention relatesto engine or other governors, and has for its aimand object the production of a mechanism driven by the engine or machineto be governed or controlled and adapted to regulate the speed thereof.Se'nsitiveness is an essential element of devices of this character, andmy improved construction has this feature to such an extent as tosatisfactorily and reliably control and govern the speed of an engineand confine its variation of speed to an extremely small limit. ormargin. The preferredembodiment of my invention has a comparativelylarge cone belted to or otherwise driven by the engine. This larger conerotates a smaller reversely-arranged cone bearing on its surface, androtatable and slidably mounted on a rod or shaft which permits the axisof the smaller cone to-be shifted to one side or the other of the fixedaxis of'the larger cone, suitable adjustable stops being provided'tolimit this shifting of the rod or shaft. The mounting of this rod alsopermits it to swing away from or toward the axis of the larger cone,such movement of the rod controlling the opening and closing of thesteam valve of the engine, the rod'being connected to the stemof thevalve by any suitableme'ans. An adjustable spr'ing is also connected tothe rod, tending to pull the shaft or rod to one side of-the axis of thelarger cone. If the cones are rotated at a suflicient speed therodcarrying the smaller.

cone will be moved by the latter to one side of the axis of the largercone against one of the adjusting stops and in opposition to thecontrolling spring: When the rod is in this inclined position, thesmaller cone travels along the same up the larger cone, its travel inthis directionbeing controlled and limited by any suitable means. 7 Asthe smaller cone ascends thelarger one traveling longitudinally .'of theshaft or rod on which it is mounted, the latter is: shifted more orless, which movement closes either fully tle. valve of the englne. Ifthe speed de creases so that the force acting on the smaller cone,tending to shift the same and the'rod on which it is mounted to oneside, is deor partially the throt- I creased and overbalanced by thecontrolling spring, the latter pulls the rod and smaller traveling coneand its supporting rod causes the cone to travel down the larger cone,which movement lowers the rod or shaft, thereby opening the steamcontrolling valve, allowing a greater supply of steam to the engineresulting in an Increase of speed. As soon as the speed becomes normalagain, the force acting on the smaller cone is sufficient to push it andits rod to the other side of the axis of the larger cone against theaction of the controlling spring, after which movement'the smaller conetravels up the larger one, cuttingofi the supply of steam more or less;.It will thus be apparent that the travel of the little cone up or downthe larger one controls the opening and closingof the steam throttlevalve 'of the engine, and that the upward or downward movement of thesmaller cone on the larger one is determined by the position of the axisof the former, which position is controlled by the speed of themechineand the spring. I

' On the accompanying drawing I have illustrated one desirableembodiment of my invention and a slight modification in theconstruction, it being understood that like reference characters referto the same parts throughout the various viewsv On th drawing'-Figure 1is a side elevation of my improved engine governor showing the throttlevalve of the engine partially in section; Fig. 2 is a plan'view of thedevice shown in Fig. 1; Fig. 3 is a vertical section on line 3-3 of Fig.l'as viewed in the direction indicated by the arrows; and Fig. 4illustrates a construction having twocontrolling springs instead of one.y

A comparatively large cone 10 is fixed to a shaft 11 rotatable inbearings'on the top of a air of standards 12 and 13. A'small pul ed tosome rotating part of the engine by a belt, not illustrated A smallerreversely arranged cone 15 contacts with the surface of the larger cone10 and is rotated thereby, the cone 15 being not only rotatablebut alsoslidable on a comparatively long rod or shaft 16, the left-hand end ofwhich is held in a clamp 1 7.hing ed at 18 to the top endof acylindrical'stud 19 fitting in and rotatable in an upright. standard oren part 20. It will be i noticedtliat because 0 t 's mounting of the ey14 1s also fixed to this shaft and is connect cone over the center ofthe'larger cone and against the other stop. This shifting of the; 0

fastened on rod 16.

rod 16 the latter may swing either sidewise or up and down. The twocones are held in firm contact by means of a downwardly pulling spring21 fastened at.22 to the base 23 of the device and secured at its upperend to a collar 24 on the rod. Lateral shifting or movement oftherod iscontrolled and regulated by means of apairof disks or stops 25 and 26located on opposite sides of the rod and mounted on adjustable screws 27and 28 engaging and passing through screw-threaded apertures in theupper ends of brackets 29 and 3t) bolted or otherwise secured to the topof standard 12.

surface of the larger cone, a stop collar 31 is To prevent the cone 15from traveling oil of the top end of the larger cone, 1 supply the rod16 with another collar 32 between which and the cone 15 is interposed acompression spring 33. An adjustable controlling or governing coilspring 34- is fastened to the rod or shaft at 35, and at its lower endit is a-djustably fastened to the top end of standard 13 at 36, thespring 34 acting or tending to pull the rod 16 over against the limitingstop or disk 25. The stem'37 of the throttling or steam supplycontrolling valve 38 is vertically reciprocatory in a bearing 39 and hasits upper end connected to the rod 16. at the point 40 by means of apair of links 41 and 42 which are hinged at right angles to permit therod 16 to turn in any direction without causing a binding of the valvestem in its bearing.

When the rod 16 is swung to one side of the axis of the larger cone 10and rests against the stop 26. and the cones are rotated in thedirections indicated by the arrows in 1* ig. 1, the smaller cone willtravel. up the larger cone, it being apparent that a com onent of theforce transmitted to the sma ler cone by the'larger one tends to pushthe same lengthwise the rod 16 toward collar 32. It will 'also beobserved that such travel of the cone lifts the rod 16 so as to closevalve 38 more or less. If the cones were rotated in the oppositedirection, cone 15* instead of traveling up the larger one would movedown. When the shaft 16 is shifted to the other side of the axis .ofcone 10 and rests against the stop 25, and the cones are rotated in thedirection indicated by the arrows, then the smaller cone travels downits companion, and it might be noted that if the direction of rotationof the cones was reversed, the cone would travel up instead of down. Ifthe-shaft 16 is directly over the axis of cone 10 then the smaller conewill travel neither up nor down, because tl'tere is no component of anyforce tending to move. it in either direction.

The operation of this engine governor is substantially follows: W henthe'engine is stoppedand is about to be started, steam is In order tolimit. and re-, strict the travel of the smaller cone down the admittedto its cylinder, valve 38 being then open to its full extent since thetraveling cone 15 is in its lowermost position against stop 81. When thespeed attained is sufiicient so that the force acting on cone 15 toshift it and the shaft 16 over the center against stop 26 in oppositionto the action of spring 34, this shifting of the shaft and cone occurs.Owing to this change of position of the shaft and cone, the latter willnow travel up the surface of the larger cone, and in so doing will liftrod 16, thereby closing to a greater or less extent valve 38. Thislimited by thecoil spring 33 surrounding the rod. If'the speeddecreases, the force acting on cone 15 which has previously held the rod16 over against stop 26 also decreases, and upon such decrease thespring 34 is enabled to pull the cone and rod over the center of thelarger cone againststop 25. Consequently, cone 15 travels down thelarger cone and in so doing opens the throttle valve to allow anincreased supply of steam to the engine, under which new supply of steamthe speed will increase, and as soon as it reaches the normal the cone15 and rod 16 will be shifted to the position indicated in Fig. 2,whereupon the smaller cone will travel up the larger one, closing thevalve more or less. From this description it will be apparent that theforce acting on thecone 15 derived from the larger cone 10 tends to holdthe rod 16 in oneposition, and that if this force, which is dependentupon the speed, decreases, the spring 34 overbalances the force actingon cone 15 and pulls the rod over' against stop 25, which action causesan increase of steam supply to the engine. It is to-be understood thatthe cone 15 need not travel all the distance down to the stop 31 beforethe/shaft 16 is shifted again over against the stop 26, since thisshifting .will occur as soon as the speed injusted to accomplish thisresult.

Although I- have described this governor as employed in connection witha throttle valve, it will readily be understood that in placeof thisvalve any of the other ordinary and usual means of controlling theengine may be employed and operated by the move: ment of the rod 16.

It is desirable to be able to run some engines inopposite directionsfandwhere my improved governor is to be employed with such an engine I usetwo springs-43 and 44 5 in place of the single spring34 to act inopposite directions on the rod 16, the outer ends of these springs beingadjustably connected to brackets 45 on the top of standard 13. 3' Thesetwo oppositely acting springs are so arranged that when the rod 16 isdirectly i above the axis of the larger cone neither is under tension,but as soon as the rod is shifted l to one side or the other, one ofthe. springs creases to the normal, t-he' parts being ad upward travelof the cone is cushioned and l 6D lfengthwise saidrevoluble member,stops to overagainst its stop.

My invention is not limited and restricted to the precise structuraldetails shown and described, since'the minor features "and elements ofmystructure may be varied con siderably without departure from thesubstance and spirit of my inventioin -Althongh I have described andillustrated my governor as ap licable for use with an engine, itwill bereadi y understood that its use is not limitedto this particular art,sinceit can be as readily employed as a water wheel governor or on anyother machine, such as a bundle carrier on a threshing machine, etc.,whose speed re uires control and regulation.

claim: 1. In a' governor, the combination of a revoluble member adaptedtobe rotated by the engine or other machine to be governed orcontrolled, a companion rotary member in contact with the surface of androtated by said revoluble member, a mounting for said companion rot'arymember permitting its axis to be shifted to one side or the other of theaxis of said revoluble member and permitting said companion member totravel lengthwise said revoluble member, and means connected to thecontrolling mechanism of the engine or other device and governed by themovement of said companion rotary member, substantially as described.

2: In a governor, the combination of a revoluble member adapted to berotated by the engine or other machine; to be governed or controlled, acompanion rotary member in contact with'the surface of and rotated bysaid revoluble member, a mounting for said companion rotary memberpermitting its axis to be shifted to one-sideor the other of the axisof'saidrevoluble member and permitting said companion member to travellengthwise said revoluble member, means acting on said companion rotarymember to shift its axis to one side ofthe axis of said revolublemember, and means connected to the controlling mechanism of the engineor other device and'governed by the movement of oluble member adapted tobe'rotated by thesaid com anion rotary-, member, substantially asescri-be'd. I p

3. In a governor, the combination of a revengine or other machine to begoverned or controlled, "Ea-companion rotary member in contact with thesurface'of and rotated by said revoluble member, a mounting forsaidcompanion rotary member permitting its axis to be shifted to one side orthe other of the axis'of said revoluble memberand permitting saidcompanion member to travel limit the shifting of said companion rotaryaxis of said companion rotary member to one means connected to thecontrollingmechanism of the engine or otherdevice and governed by themovement of said companion rotary member, substantially as described 4.In a governor, the combination of'a revoluble member adapted to berotated by the engine or other machine to be governed or controlled, acompanion rotary member in com anion member to travel lengthwise said'revo uble member, and means connected to thecontrolling mechanism of theengme or other device and governed by the-movement of said companionrotary member, substantially as described.

5. In a governor, the combination of a revoluble member-adapted to berotated by the engine or other machine to be governed or controlled, acompanion rotary member in contact with the surface of and rotated bysaid revoluble member, onevof said members being a cone, amounting forsaid companion rotary 'member permitting its axis to be shifted to oneside or the other of the axis of said revoluble member and permittingits companion member to travel lengthwise said revoluble member, nieansacting on said companion rotary member to shift its axis to one side ofthe axis of said revoluble member, and means connected to thecontrolling mechanism of the engine or other device and governed by themovement-of said comp anion rotary member, substantially as described.

6. In a governor, the combination of a' first cone adapted to be rotatedby the engine or other machine to be governed or controlled, a secondcone reversely-arranged with respect to, in contact witli,.and rotated.bysaid first cone, a mounting for said second cone permitting its axisto be shifted to one side or the other of the axis of said first coneand permitting said second cone to travel lengththe controllingmechanism of the engineor other device and governed by the movement.

of said second cone, substantially a's described.

I 7. In a governor, the combination of a first cone'adapted to berotatedby the engine or other machine to be governed or controlled a secondcone reversely-arranged with re spect to, in contact'with, and rotatedby said first cone, a mounting for said second cone permitting its axisto be shifted to one side or the otherof the axis of said first cone andpermitting said second done to travel lengthwise said first cone, stopsto limit theshiftin ofsaid second cone to one side or the ot er of theaxis of said first cone,-".means side of the axis of said revolubiemember, and

acting on said second cone and tending to shift the. axis thereof to oneside of said first one, and means connected to the controlling mechanismof the engine or other device and governed by the movement of saidsecond cone, substantially as described.

8' 111 a governor, the combination of a first Cone adapted to be rotatedby the engine or other machine to be governed or controlled, a secondcone reversely-arranged with respect to, in contact with, and rotated bysaid lirst cone, a rod or shaft on which said second cone is rotatableand longitudinally movable, a mounting for said shaft permitting itsaxis to be shifted to one side or the other 0i and toward and from theaxis of said first cone, means acting on said rod tending to shift theaxis of the same to one side of the axis of said first cone, and meansconnecting said rod to the controlling mechanism of the engine or othermachine, substantially as described.

r able, a mounting for said ting its axis to be shifted to one side orthe,

.to shift the axis of the same to one 9. In a governor, the combinationof a first cone adapted to be rotated by the engine or other machine tobe governed or controlled,

-a second cone revcrsely-arranged with respectto, in contact with,androtated by said first cone, a rod or shaft on which said second coneis rotatable and longitiidina'lly movrod or shaft permitother of andtoward and from the axis of said first cone, means acting on said rodtending side of the axis of said first cone, stops to limit shifting ofsaid rod or shaft, stops to limit the travel of said second cone on-saidrod, and means connecting said rod to the controlling mechanism of theengine or other machine, substantially as described.

ALLAN CHURCH ALLAN; Witnesses:

GEORGE L. PEoK, GEORGE A. TURNER

